Brand: WIKA

WIKA 233.50 Bourdon Tube Pressure Gauge

Name: WIKA 233.50 Bourdon Tube Pressure Gauge – Datasheet & Quote
Brand: WIKA

Description

Overview

WIKA 233.50 is a stainless steel Bourdon tube pressure gauge engineered specifically for the process industry, combining a fully stainless steel construction with a liquid-filled case suited to applications with high dynamic pressure loads or vibration. Manufactured and qualified in accordance with EN 837-1 and ASME B40.100, the WIKA 233.50 delivers scale ranges from 0 to 0.6 bar up to 0 to 1,600 bar (0 to 20,000 psi), covering the wide variety of measuring ranges required across chemical, petrochemical, and general process engineering applications.

With fast quotation turnaround and technical support, Seven Star LLC proudly supplies the WIKA 233.50 Bourdon tube pressure gauge to industrial, oil and gas, and process customers across Oman and the wider GCC. Every gauge supplied through Seven Star LLC comes with manufacturer documentation and access to local technical support – supporting facility engineers and procurement teams in Muscat, Sohar, and Salalah who specify the WIKA 233.50.

Working Principle

The WIKA 233.50 operates on the Bourdon tube measuring principle: process pressure enters a curved, sealed metal tube that tends to straighten in proportion to the applied pressure, and this mechanical deflection is transmitted through a movement to a pointer that indicates pressure directly on a graduated dial. Because the sensing element is purely mechanical, the WIKA 233.50 requires no auxiliary power to provide a reliable local pressure reading, making it a straightforward, fail-safe indicator wherever electronic transmission is not required.

The liquid-filled case of the model 233.50 dampens needle flutter and mechanical wear caused by pulsating pressure or ambient vibration, extending gauge life and improving reading stability in demanding rotating-equipment or pulsating-flow environments compared with a standard dry-case gauge. As a safety function, the instrument incorporates a blow-out device with a blow-out plug on the back of the case, allowing overpressure to safely vent in the event of a Bourdon tube failure rather than releasing pressure toward the operator reading the dial.

Engineering Design of the WIKA 233.50

The WIKA 233.50 is constructed entirely in stainless steel, including the Bourdon tube and case, making it suitable for liquid and gaseous media in aggressive and corrosive environments as long as the media is not highly viscous or crystallizing. The gauge is available in nominal sizes of 63 mm (2½ in.), 100 mm (4 in.), and 160 mm (6 in.), with accuracy class 1.6 for the NS 63 size and class 1.0 for the NS 100 and NS 160 sizes, and process connections including lower mount (LM), center back mount (CBM), and lower back mount (LBM) configurations to suit different panel and pipe layouts.

Operating temperature limits reach up to +200°C (+392°F) for the medium in dry configurations and up to +100°C (+212°F) for liquid-filled versions, with ambient temperature ranges extending down to -40°C (-40°F) depending on fill type. The WIKA 233.50 carries German Lloyd and Gosstandart approvals and demonstrates excellent load-cycle stability and shock resistance, a combination that has made the 232.50/233.50 series a bestselling reference gauge across WIKA’s stainless steel pressure gauge range.

Key Features

The WIKA 233.50 combines all-stainless-steel durability with vibration resistance and wide-range measurement capability that make it a standard choice for process industry pressure indication.

Liquid-filled case dampens pointer flutter and mechanical wear from vibration and pulsating pressure.
Fully stainless steel construction resists corrosion in aggressive chemical and petrochemical environments.
Scale ranges from 0 to 0.6 bar up to 0 to 1,600 bar (0 to 20,000 psi) cover a broad range of process applications.
A rear blow-out device safely vents overpressure in the event of Bourdon tube failure, protecting the operator.
Manufactured and qualified to EN 837-1 and ASME B40.100 for internationally recognized quality assurance.
Available in 63, 100, and 160 mm nominal case sizes with multiple mounting configurations.
Excellent load-cycle stability and shock resistance suit rotating equipment and pulsating flow applications.
German Lloyd and Gosstandart approvals support use in marine and additional regulated markets.

Industrial Applications

The WIKA 233.50 is deployed across chemical and petrochemical processing, power generation, mining, onshore and offshore oil and gas, environmental technology, and general plant construction wherever a rugged, vibration-resistant pressure gauge is required for local indication. Typical duties include pump and compressor discharge monitoring, pipeline pressure verification, and process vessel pressure indication in environments with significant mechanical vibration.

With engineering support in Muscat, Seven Star LLC supplies the WIKA 233.50 to refineries, petrochemical complexes, and industrial facilities throughout Oman and the GCC. The gauge is a strong fit for pump stations and rotating equipment across the Sohar and Salalah industrial zones, as well as for oil and gas and power generation facilities across Muscat that require dependable, vibration-resistant local pressure indication.

Technical Specifications

The table below summarizes the core specifications of the WIKA 233.50 Bourdon tube pressure gauge as supplied by Seven Star LLC.

Parameter	Specification
Model	WIKA 233.50 (liquid-filled); 232.50 (dry case)
Measuring Principle	Bourdon tube (mechanical)
Case Material	Stainless steel (fully welded)
Nominal Sizes	63 mm (2½ in.), 100 mm (4 in.), 160 mm (6 in.)
Scale Ranges	0 – 0.6 bar to 0 – 1,600 bar (0 – 10 to 0 – 20,000 psi)
Accuracy Class	1.6 (NS 63); 1.0 (NS 100, NS 160)
Standards	EN 837-1, ASME B40.100
Process Temperature	Up to +200°C (dry); up to +100°C (liquid-filled)
Safety Feature	Rear blow-out device with blow-out plug
Approvals	German Lloyd, Gosstandart
Typical Applications	Chemical, petrochemical, power, mining, oil & gas, plant construction

Request a Quote for WIKA 233.50 Bourdon Tube Pressure Gauge

Seven Star LLC supports the full procurement cycle for the WIKA 233.50 Bourdon tube pressure gauge, from formal RFQ submission to confirmation of availability and lead time, technical datasheet delivery, and direct consultation with our instrumentation division on scale range, mounting configuration, and fill type selection for your application. We supply every WIKA 233.50 pressure gauge with manufacturer documentation and dependable local technical support. Contact Seven Star LLC today to request a quotation or discuss your pressure measurement requirements.

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About brand

WIKA is the German manufacturer of pressure, temperature, level and flow instruments, best known for its pressure gauges. Alexander Wiegand and Philipp Kachel founded it on 2 January 1946 in Klingenberg am Main, Bavaria. The name comes from the first two letters of their surnames. WIKA is still run by the Wiegand family and is headquartered in Klingenberg.

Seven Star LLC is an independent supplier in Muscat. We list WIKA pressure gauges, diaphragm seals, transmitters, switches, thermometers and thermowells, and supply them to plants, contractors and panel builders in Oman and the GCC by model and order code.

WIKA company profile

Established	2 January 1946, Klingenberg am Main, Germany, by Alexander Wiegand and Philipp Kachel
First products	Mechanical pressure and temperature gauges
Ownership	Family-owned; managed by Alexander Wiegand, grandson of the founder, since 1996
Product families	Pressure gauges, diaphragm seals, pressure transmitters and switches, thermometers, RTDs, thermocouples, thermowells, calibration equipment, level and flow instruments

Milestones

1946: Alexander Wiegand and Philipp Kachel found the company in Klingenberg am Main on 2 January; pressure gauge production starts at the end of the year. The name WIKA comes from the first letters of their surnames.
1951: Konrad Wiegand, the founder's son, takes over management.
1967: Ursula Wiegand leads the company after her husband's death.
1986: The company is reunited with the Kachel thermometer factory, which Philipp Kachel had set up after leaving in 1956.
1994: Certification to DIN ISO 9001.
1996: Alexander Wiegand, the founder's grandson, becomes head of the company.

WIKA products we list

Family	Models	Typical use
Bourdon tube pressure gauges	111.10, 111.12, 212.20, 213.53, 232.50, 233.50, 232.30/233.30 safety pattern	HVAC and utilities (111 series) to process plants (23x series in stainless steel)
Diaphragm and differential pressure gauges	432.50, 732.51, 700.01, DPGT43	Low pressures, viscous or dirty media, and filter differential pressure
Diaphragm seals	990.10, 990.27	Separating the gauge from corrosive, hot or clogging media
Transmitters, switches and test gauges	A-10, UPT-20, PSM01, CPG1500	4-20 mA pressure signals, switching, and precision calibration checks
Thermometers	TG54, Model 55, A52, 73 gas-actuated	Local temperature indication on pipes, vessels and HVAC
Temperature sensors and thermowells	TR10, TR12-B, TR33, TC10-B, TW10 flanged, TW15 threaded	RTD and thermocouple measurement in process lines

The WIKA model number tells you the build. In 232.50, the first digit 2 means stainless steel wetted parts, the second digit 3 means a liquid-fillable case, and ".50" is the case style. The 111 series uses copper alloy wetted parts and suits water and air. Where the medium is corrosive, very hot or would block the gauge, a diaphragm seal such as the 990.27 keeps it away from the Bourdon tube. For temperature, a thermowell like the TW10 lets you remove the sensor without opening the process.

Where WIKA instruments are used

In Oman and the GCC, WIKA gauges, transmitters and thermometers are used in oil and gas, refining and petrochemical plants, power and desalination, water networks, district cooling and HVAC, and on skids and machines from OEMs.

Ordering WIKA instruments: what we need

Send the model, dial size (for example 63, 100 or 160 mm), range and unit, connection size and position (lower or back mount), accuracy class and whether liquid filling is needed. For diaphragm seals and thermowells, add the process connection, materials and insertion length.

Facts checked against WIKA company history, October 2026.

Browse WIKA products by category: Pressure Instrumentation, Temperature Instrumentation.

Frequently Asked Questions

What is the difference between the WIKA 232.50 and 233.50 pressure gauge?

The WIKA 232.50 is the dry-case version of this stainless steel Bourdon tube gauge, while the WIKA 233.50 has a liquid-filled case that dampens pointer flutter and mechanical wear caused by vibration or pulsating pressure, extending service life in demanding rotating equipment applications.

What pressure ranges are available for the WIKA 233.50?

The WIKA 233.50 is available in scale ranges from 0 to 0.6 bar up to 0 to 1,600 bar (0 to 20,000 psi), covering the wide variety of measuring ranges required across process, chemical, and petrochemical applications.

Is the WIKA 233.50 suitable for corrosive process media?

Yes. The gauge is fully constructed in stainless steel, making it suitable for liquid and gaseous media in aggressive and corrosive environments, provided the media is not highly viscous or crystallizing.

What safety feature protects the operator if the Bourdon tube fails?

The WIKA 233.50 includes a blow-out device with a blow-out plug on the back of the case, which allows overpressure to safely vent away from the operator in the event of a Bourdon tube failure.

Is Seven Star LLC an experienced supply partner for WIKA products?

Yes, Seven Star LLC is an experienced supplier of WIKA in Oman and the GCC. We supply genuine WIKA instrumentation with manufacturer documentation and local technical support.

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